refactor: streamline test suite - cut 33 files, enable parallel execution (11.9x speedup)

Remove duplicate, low-value, and fragmented test files while preserving
all meaningful coverage. Enable parallel test execution and remove
the entire benchmark infrastructure.

Key changes:
- Consolidate workflow-validator tests (13 files -> 3)
- Consolidate config-validator tests (9 files -> 3)
- Consolidate telemetry tests (11 files -> 6)
- Merge AI validator tests (2 files -> 1)
- Remove example/demo test files, mock-testing files, and already-skipped tests
- Remove benchmark infrastructure (10 files, CI workflow, 4 npm scripts)
- Enable parallel test execution (remove singleThread: true)
- Remove retry:2 that was masking flaky tests
- Slim CI publish-results job

Results: 224 -> 191 test files, 4690 -> 4303 tests, 121K -> 106K lines
Local runtime: 319s -> 27s (11.9x speedup)

Conceived by Romuald Członkowski - www.aiadvisors.pl/en

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/benchmark.yml

@@ -1,214 +0,0 @@
-name: Performance Benchmarks
-
-on:
-  push:
-    branches: [main, feat/comprehensive-testing-suite]
-    paths-ignore:
-      - '**.md'
-      - '**.txt'
-      - 'docs/**'
-      - 'examples/**'
-      - '.github/FUNDING.yml'
-      - '.github/ISSUE_TEMPLATE/**'
-      - '.github/pull_request_template.md'
-      - '.gitignore'
-      - 'LICENSE*'
-      - 'ATTRIBUTION.md'
-      - 'SECURITY.md'
-      - 'CODE_OF_CONDUCT.md'
-  pull_request:
-    branches: [main]
-    paths-ignore:
-      - '**.md'
-      - '**.txt'
-      - 'docs/**'
-      - 'examples/**'
-      - '.github/FUNDING.yml'
-      - '.github/ISSUE_TEMPLATE/**'
-      - '.github/pull_request_template.md'
-      - '.gitignore'
-      - 'LICENSE*'
-      - 'ATTRIBUTION.md'
-      - 'SECURITY.md'
-      - 'CODE_OF_CONDUCT.md'
-  workflow_dispatch:
-
-permissions:
-  # For PR comments
-  pull-requests: write
-  # For pushing to gh-pages branch
-  contents: write
-  # For deployment to GitHub Pages
-  pages: write
-  id-token: write
-
-jobs:
-  benchmark:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          # Fetch all history for proper benchmark comparison
-          fetch-depth: 0
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20
-          cache: 'npm'
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Build project
-        run: npm run build
-
-      - name: Run benchmarks
-        run: npm run benchmark:ci
-        
-      - name: Format benchmark results
-        run: node scripts/format-benchmark-results.js
-        
-      - name: Upload benchmark artifacts
-        uses: actions/upload-artifact@v4
-        with:
-          name: benchmark-results
-          path: |
-            benchmark-results.json
-            benchmark-results-formatted.json
-            benchmark-summary.json
-
-      # Ensure gh-pages branch exists
-      - name: Check and create gh-pages branch
-        run: |
-          git fetch origin gh-pages:gh-pages 2>/dev/null || {
-            echo "gh-pages branch doesn't exist. Creating it..."
-            git checkout --orphan gh-pages
-            git rm -rf .
-            echo "# Benchmark Results" > README.md
-            git add README.md
-            git config user.name "github-actions[bot]"
-            git config user.email "github-actions[bot]@users.noreply.github.com"
-            git commit -m "Initial gh-pages commit"
-            git push origin gh-pages
-            git checkout ${{ github.ref_name }}
-          }
-
-      # Clean up workspace before benchmark action
-      - name: Clean workspace
-        run: |
-          git add -A
-          git stash || true
-      
-      # Store benchmark results and compare
-      - name: Store benchmark result
-        uses: benchmark-action/github-action-benchmark@v1
-        continue-on-error: true
-        id: benchmark
-        with:
-          name: n8n-mcp Benchmarks
-          tool: 'customSmallerIsBetter'
-          output-file-path: benchmark-results-formatted.json
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          auto-push: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
-          # Where to store benchmark data
-          benchmark-data-dir-path: 'benchmarks'
-          # Alert when performance regresses by 10%
-          alert-threshold: '110%'
-          # Comment on PR when regression is detected
-          comment-on-alert: true
-          alert-comment-cc-users: '@czlonkowski'
-          # Summary always
-          summary-always: true
-          # Max number of data points to retain
-          max-items-in-chart: 50
-          fail-on-alert: false
-
-      # Comment on PR with benchmark results
-      - name: Comment PR with results
-        uses: actions/github-script@v7
-        if: github.event_name == 'pull_request'
-        continue-on-error: true
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          script: |
-            try {
-              const fs = require('fs');
-              const summary = JSON.parse(fs.readFileSync('benchmark-summary.json', 'utf8'));
-              
-              // Format results for PR comment
-              let comment = '## 📊 Performance Benchmark Results\n\n';
-              comment += `🕐 Run at: ${new Date(summary.timestamp).toLocaleString()}\n\n`;
-              comment += '| Benchmark | Time | Ops/sec | Range |\n';
-              comment += '|-----------|------|---------|-------|\n';
-              
-              // Group benchmarks by category
-              const categories = {};
-              for (const benchmark of summary.benchmarks) {
-                const [category, ...nameParts] = benchmark.name.split(' - ');
-                if (!categories[category]) categories[category] = [];
-                categories[category].push({
-                  ...benchmark,
-                  shortName: nameParts.join(' - ')
-                });
-              }
-              
-              // Display by category
-              for (const [category, benchmarks] of Object.entries(categories)) {
-                comment += `\n### ${category}\n`;
-                for (const benchmark of benchmarks) {
-                  comment += `| ${benchmark.shortName} | ${benchmark.time} | ${benchmark.opsPerSec} | ${benchmark.range} |\n`;
-                }
-              }
-              
-              // Add comparison link
-              comment += '\n\n📈 [View historical benchmark trends](https://czlonkowski.github.io/n8n-mcp/benchmarks/)\n';
-              comment += '\n⚡ Performance regressions >10% will be flagged automatically.\n';
-              
-              await github.rest.issues.createComment({
-                issue_number: context.issue.number,
-                owner: context.repo.owner,
-                repo: context.repo.repo,
-                body: comment
-              });
-            } catch (error) {
-              console.error('Failed to create PR comment:', error.message);
-              console.log('This is likely due to insufficient permissions for external PRs.');
-              console.log('Benchmark results have been saved to artifacts instead.');
-            }
-
-  # Deploy benchmark results to GitHub Pages
-  deploy:
-    needs: benchmark
-    if: github.ref == 'refs/heads/main'
-    runs-on: ubuntu-latest
-    environment:
-      name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-        with:
-          ref: gh-pages
-        continue-on-error: true
-        
-      # If gh-pages checkout failed, create a minimal structure
-      - name: Ensure gh-pages content exists
-        run: |
-          if [ ! -f "index.html" ]; then
-            echo "Creating minimal gh-pages structure..."
-            mkdir -p benchmarks
-            echo '<!DOCTYPE html><html><head><title>n8n-mcp Benchmarks</title></head><body><h1>n8n-mcp Benchmarks</h1><p>Benchmark data will appear here after the first run.</p></body></html>' > index.html
-          fi
-          
-      - name: Setup Pages
-        uses: actions/configure-pages@v4
-        
-      - name: Upload Pages artifact
-        uses: actions/upload-pages-artifact@v3
-        with:
-          path: '.'
-          
-      - name: Deploy to GitHub Pages
-        id: deployment
-        uses: actions/deploy-pages@v4

.github/workflows/test.yml

@@ -133,23 +133,6 @@ jobs:
       - name: Run type checking
         run: npm run typecheck
       
-      # Run benchmarks
-      - name: Run benchmarks
-        id: benchmarks
-        run: npm run benchmark:ci
-        continue-on-error: true
-      
-      # Upload benchmark results
-      - name: Upload benchmark results
-        if: always() && steps.benchmarks.outcome != 'skipped'
-        uses: actions/upload-artifact@v4
-        with:
-          name: benchmark-results-${{ github.run_number }}-${{ github.run_attempt }}
-          path: |
-            benchmark-results.json
-          retention-days: 30
-          if-no-files-found: warn
-      
       # Create test report comment for PRs
       - name: Create test report comment
         if: github.event_name == 'pull_request' && always()
@@ -222,7 +205,6 @@ jobs:
           echo "" >> $GITHUB_STEP_SUMMARY
           echo "- [Test Results](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})" >> $GITHUB_STEP_SUMMARY
           echo "- [Coverage Report](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})" >> $GITHUB_STEP_SUMMARY
-          echo "- [Benchmark Results](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})" >> $GITHUB_STEP_SUMMARY
       
       # Store test metadata
       - name: Store test metadata
@@ -252,24 +234,21 @@ jobs:
           path: test-metadata.json
           retention-days: 30
 
-  # Separate job to process and publish test results
+  # Publish test results as checks
   publish-results:
     needs: test
     runs-on: ubuntu-latest
     if: always()
     permissions:
       checks: write
-      pull-requests: write
     steps:
       - uses: actions/checkout@v4
-      
-      # Download all artifacts
-      - name: Download all artifacts
+
+      - name: Download test results
         uses: actions/download-artifact@v4
         with:
           path: artifacts
-      
-      # Publish test results as checks
+
       - name: Publish test results
         uses: dorny/test-reporter@v1
         if: always()
@@ -279,75 +258,4 @@ jobs:
           path: 'artifacts/test-results-*/test-results/junit.xml'
           reporter: java-junit
           fail-on-error: false
-          fail-on-empty: false
-      
-      # Create a combined artifact with all results
-      - name: Create combined results artifact
-        if: always()
-        run: |
-          mkdir -p combined-results
-          cp -r artifacts/* combined-results/ 2>/dev/null || true
-          
-          # Create index file
-          cat > combined-results/index.html << 'EOF'
-          <!DOCTYPE html>
-          <html>
-          <head>
-              <title>n8n-mcp Test Results</title>
-              <style>
-                  body { font-family: Arial, sans-serif; margin: 40px; }
-                  h1 { color: #333; }
-                  .section { margin: 20px 0; padding: 20px; border: 1px solid #ddd; border-radius: 5px; }
-                  a { color: #0066cc; text-decoration: none; }
-                  a:hover { text-decoration: underline; }
-              </style>
-          </head>
-          <body>
-              <h1>n8n-mcp Test Results</h1>
-              <div class="section">
-                  <h2>Test Reports</h2>
-                  <ul>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-reports/report.html">📊 Detailed HTML Report</a></li>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-results/html/index.html">📈 Vitest HTML Report</a></li>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-reports/report.md">📄 Markdown Report</a></li>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-summary.md">📝 PR Summary</a></li>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-results/junit.xml">🔧 JUnit XML</a></li>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-results/results.json">🔢 JSON Results</a></li>
-                      <li><a href="test-results-${{ github.run_number }}-${{ github.run_attempt }}/test-reports/report.json">📊 Full JSON Report</a></li>
-                  </ul>
-              </div>
-              <div class="section">
-                  <h2>Coverage Reports</h2>
-                  <ul>
-                      <li><a href="coverage-${{ github.run_number }}-${{ github.run_attempt }}/html/index.html">HTML Coverage Report</a></li>
-                      <li><a href="coverage-${{ github.run_number }}-${{ github.run_attempt }}/lcov.info">LCOV Report</a></li>
-                      <li><a href="coverage-${{ github.run_number }}-${{ github.run_attempt }}/coverage-summary.json">Coverage Summary JSON</a></li>
-                  </ul>
-              </div>
-              <div class="section">
-                  <h2>Benchmark Results</h2>
-                  <ul>
-                      <li><a href="benchmark-results-${{ github.run_number }}-${{ github.run_attempt }}/benchmark-results.json">Benchmark Results JSON</a></li>
-                  </ul>
-              </div>
-              <div class="section">
-                  <h2>Metadata</h2>
-                  <ul>
-                      <li><a href="test-metadata-${{ github.run_number }}-${{ github.run_attempt }}/test-metadata.json">Test Run Metadata</a></li>
-                  </ul>
-              </div>
-              <div class="section">
-                  <p><em>Generated at $(date -u +%Y-%m-%dT%H:%M:%SZ)</em></p>
-                  <p><em>Run: #${{ github.run_number }} | SHA: ${{ github.sha }}</em></p>
-              </div>
-          </body>
-          </html>
-          EOF
-      
-      - name: Upload combined results
-        if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: all-test-results-${{ github.run_number }}
-          path: combined-results/
-          retention-days: 90
+          fail-on-empty: false